Sony 16mm f2.8 Fisheye Lens Captures dynamic dramatic images with lens with curvilinear distortion, exaggerated perspective and extreme depth of field. Diagonal angle of view 180° in 35 mm format (110° in APS-C format). Focusing distance from 20 cm to infinity. Four selectable internal filters. Zoom or Prime Prime Focal length (wide) 16 Focal length (tele) 16 Max aperture (wide) 2.8 Max aperture (tele) 2.8 Lens mount Sony/Minolta Sensor Format Full Frame Filter thread (mm) Integrated Weight (g) 400 Size 75x66.5mm Colour Black Minimum aperture 22 Lens elements 11 Lens groups 8 Aperture blades 7 Enlargement Ratio 1:6.7